Heat-insulating cover.



H. W. BURGHER.

HEAT INSULATING COVER.

APPLICATION FILED MAR.25.1915.

1,1 90.857. 11111111611 July 11, 1916..

2 SHEETS-SHEET l.

H. W. BURGHER.

HEAT INSULAUNG COVER.

APPUCATION F11EDMAR.25.1915.

Patented July 11, 1916.

2 SHEETS-SHEET 2.

y ll,ll90,857.

rva citizen of the HERMAN WINANS BURGHER, 0F PORT KENNEDY, PENNSYLVANIA.

HET-INSULATING COVER.

Specification of Letters Patent.

Patented .rally ii, raie.

Application led Mar-ch 25, 1915. Serial N o. 16,903.

of an insulating cover by multiplying the form number of unit layers employed; to protect in service a cover constructed and arranged in accordance with the present invention; to form a cover as characterized having a cel# lular structure; and to provide an insulati g cover having internal dead-air-containing chambers or cells.

Drawings--Figure l is a top view of a fragment of cover constructed and arranged in accordance with the present invention; Fig. 2 is a section on an enlarged scale showing a unit sheet of said cover prior to the same being pressed or crimped; Fig. 3 is a similar view showing the sheet after same has been pressed or crimped; Fig. 4 is a section of a cover having two thicknesses or sheets united as in servlce; Fig. 5 is a detail view in cross section showing a half section of a pipe and cover therefor; said cover being constructed and arranged in accordance with the present invention, the view being on a diminished scale. Fig. 6 is a section of a cover having two thicknesses or sheets constructed in accordance with the modied form of the invention. Fig. 7 is a cross section of a half section of a pipe and,cover therefor, said cover being constructed and arranged in accordance with the modified of the invention. DescmlptomAs seen in ing drawings, a unit sheet is a relatively wool, hair, or other equivalent compound. In the preferred form I employ crude felt. This\layer`is covered on one surface with formed, having a relatively thin layer 7 of asbestos cloth.

'Ihe layers 6 and 7 are lightly pressed together, being` caused to adhere, any suitable adhesive being employed for this purpose. Full-length sheets of the felt layer 6 and of the asbestos layer 7 are employed. After be-v ing adhered, as shown in Fig. 2 of the drawings, the sheet is passed through crimping the accompanythick layer 6 of felt, mineral rollers, the surface whereof is preferably arranged to produce depressions 8 arranged in staggered relation, as shown in Fig. l of the drawings. When passing through the rollers, the total layered sheet is complete and forms what is her'ein styled a single or unit thickness. v

Sheets constructed as above described are intended for what may be termed the body of the insulating cover. One such sheet is provided, having a light canvas duck layer 9, which is preferably impregnated with a suitable non-inflammable chemical. If the specified insulating cover calls for one thickness or sheet of such covering, the sheet used is the one provided with the outer duck layer 9. If two or more thicknesses or layers be necessary, a cover, such as shown in Fig. 4 of the drawings, is employed. In this cover the two sheets are adhered, a suitable adhesive being placed upon the asbestos cloth layer 7 of one sheet, and the felt of the other sheet being then pressed thereupon. When joining two or more of the unit sheets, care is exercised to overlay the depressions 8 in the juxtaposed sheets, to form, as seen best in Fig. 4 of the drawings, pockets wherein air is immovably trapped, thereby forming what is styled a dead-air cell.

When the cover composed of two ,or more thicknesses or unit layers is employed, it is attached to the protected article by any suitable adhesive. When so installed, the outer surface 0f the cover is protected against abrasive wear by the duck layer 9.

VWhile I have herein described and have shown in the accompanying drawings the cover in sheet form, it will be understood that lthe compiled material may be shaped to any suitable form, such as is conventionally employed for covering pipes of either heating or refrigerating plants. It will also be understood cover may be pressed into suitable shapes, to bel employed as a removable cover for surfaces, to retard the toorapid radiation thereof, as, for instance, the surface of an automobile engine hood, which it is desired in certain weather to protect from too rapid radiation. A The insulating cover, when formed in sheets, is suitable for lining steel passenger-or freight cars, and is more especially employed for the lining of refrigerating cars. It will alsobe understood that while I have herein shown the layers 6 and that when desired the v 7 as having a. certain relative thickness, this may be varied to suit the eXigencies of employment, the desire of the owner, or the fancy of the designer.

Claims: v f 1. A cover as characterized, comprising i a layer of inflammable ber; a layer of n on-n inammable ber, said layers being formedv as'. a homogeneous sheet, said sheet being pressed to form surface depressions therein, said depressions being formed in opposite surfaces of said sheet; and a protective A thereof being layer for said sheet, constructed from a Woven fabric permanently attached to saidsheet and to the layer of non-infiammable ber thereof, said protective cover being indented in correspondence with said sheet.

3. A cover as characterized, comprising a plurality of unit sheets, each embodying superposed layers of inammable ber and non inflammable ber united and indented to form pockets in the surfaces thereof, said sheets being adhered in Superposed relation, and the pockets superposed to form internal cells. i y

In testimony whereof I have signed my name to this specication in the presence of two subscribing Witnesses.

HERMAN WINANS BURGHER.

`Witnessesz MUscoE M. GIBSON, LILLIAN E. MAGILL.

homogeneously 

